347795

Appears in sequences

• Number of permutations avoiding the consecutive pattern 23451.at n=8A202222
• a(n) = a(n-1) + 3*a(n-2) -2*a(n-3) - 2*a(n-4), where a(0) = 0, a(1) = -1, a(2) = 0, a(3) = 1.at n=25A295735